Frictional driving-wheel.



No. 659,427. y Patented oct. |900.

w. u wonTH.

FRICTIONAL DRIVING WHEEL.

(Application led Nov. 8, 1899.

(No Model.)

UNITED STATES PATENT EEICE.

VILLIAM O. WORTH, OE CHICAGO, ILLINOIS, ASSIGNOR OE TWO-THIRDS TO WILLIAM R.. DONALDSON, OE LOUISVILLE, KENTUCKY, AND HENRY W. KELLOGG, OE BATTLE CREEK, MICHIGAN. y

FRICTIONAL DRIVING-WHEEL.

SPECIFICATION formlng part of Letters Patent No. 659,427, dated October 9, 1900.

Application filed November 6. 1899. Serial No. 735,954.Y kNo model.)

To all whom t may concern: in a plastic state and then vnlcanize it while 3o Be it known that I, WILLIAM O. WORTH, a it is in place. Pressure may be applied to citizen of the United States, residingin Chithe face of the friction-surface during the cago, county of Cook, and State of Illinois, time that the vulcanizing process is going on. 5 have invented certain new and useful Im-l The degree to which this process of vulcanprovementsin Friction Driving-Wheels; and izing is continued will be determined by eX- 55 I do hereby declare the following to he a full, perience. I have found that when the maclear, and exact description of the invention, terialis approximately semivulcanized it will such as will enable persons skilled in the art then possess the desired quality. The cirio to which it appertains to make and use the oumferential grooves are cut into the face same. of the disk a to prevent the material c from 6o My invention relates to improvements in spreading radially, and those which are cut friction driving-wheels. into the face in radial lines prevent it from The object of my invention is to provide a creeping around the wheel when pressure is i5 friction-wheel for the transmission of power applied to the face of the disk by the contact the surface of which shall be made of such a with the drivenvwheel. The rim a2 holds it 65 material so applied to the body of the wheel in place. Ordinary rubbergum when applied as to possess a very high coefficient when in to a wheel and treated in the manner defrictional contact with a driven wheel which scribed possesses features that are very dezo it is designed to rotate. sirable for the purpose set forth. The co- My wheel is especially designed for motors efiicient of friction between the driving and 7o used on motor-vehicles, and it is especially driven wheel is very high. The yielding surapplicable to the transmission of power when Yface of the driving-wheel, as a result of its fixed to the main shaft of a gas-engine and yielding elastic nature, affects a greater sur- 25 associated with a wheel upon a shaft placed face contact between the surface of driving at right angles to the main shaft, the speed and driven wheel than is possible when two 75 of the driven wheel being determined with unyielding surfaces are used for the purpose. relation to the driving-wheel upon the loca- Another highly-valuable quality possessed tion of the former along the face of the latter. by my invention is the fact that when the 3o In the drawings,`Figure lis asectionalview driven wheel, mounted upon a shaft practiof my driving-disk, of cast-iron or similar macally parallel with the face of the driver, said 8o terial, before the frictional material has been wheel having a travel thereon within the limapplied, showing the rim a2 in section. Fig. its Aof the said face, is driven thereby the 2 is a section through line 2 2 of Fig. l with speed may be changed by increasing or de- 35 the friction material applied. y creasing the revolutions of the driven wheel A disk ct, having a hul) ct', is .fixed to shaf in very small increments or decrements as 85 b. A rim a2 extends around the disk a and the driven wheel may be positioned at a l overlaps friction-surface c, and grooves a3 are longer or shorter radius of the driver. This cut into the surface of the wheel, as shown. characteristic is not new in my invention; but 4o Radial grooves a4 are also cut into the face heretofore this ideal method of changing the in a similar manner and of equal depth. power and speed of the driven wheel could 9o These grooves may be made wider at the botnot be utilized when inflexible or unyielding tom, if desirable, for the purpose of retainsurfaces are used on account of its lowefling the material that is to be forced therein ciency and the great noise made by the un- 45 more securely. yielding'surfaces of the driving and driven The material which' I propose to use for wheels when in contact. 95

friction-surface c is a product of rubbervor a My device may be operated to a very great material having similar characteristics. I advantage on mot0r-vehicles,'as its efliciency press the material into the grooves while it is is very high and it is almost entirely noiseless, or on any kind of machinery whereit is desirable to secure the advantages described.

By using an elastic surface on the face of the driving-wheel and by tapering the face of the driven wheel properly the dierential action due to the unequal speed of the driving-wheel where it makes contact at various points on its radius across the face of the driven wheel, which is always present when unyielding surfaces are used,is avoided. The driven Wheel should be tapered so that the portion of its face farthest from the center of the driving-wheel is slightly larger in diameter than that portion near the center of the driver,and when contact is made between the driving and the driven Wheel the yielding material of the driver will be somewhat more depressed at this point,and by this means the speed relation across the face of the driven wheel will become more uniform than it is possible to obtain with the usual device of this nature. I have found that the material described and Which I use for thisfpurpose remains unaffected by the weather and in every way is adapted to the use set forth.

Having described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

A driving-Wheel Ifor `the transmission of power, comprising a supporting-disk having grooves iu the face thereof, a yielding, frictional material secured in the said grooves, the said disk having an overlapping rim extendinginwardly from the periphery over the face of the said material, substantially as set forth.

In testimony whereof I have signed this specification, in the presence of two subscribing witnesses, this ist day of November, 1899.

WILLIAIWI O. WORTH.

Witnesses:

M. F. ALLEN, LOUIS G. SMITH. 

